Merging upstream version 1.70.0+dfsg2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/vendor/crypto-bigint/src/uint/bit_not.rs b/vendor/crypto-bigint/src/uint/bit_not.rs
new file mode 100644
index 000000000..747d3b49e
--- /dev/null
+++ b/vendor/crypto-bigint/src/uint/bit_not.rs
@@ -0,0 +1,48 @@
+//! [`UInt`] bitwise not operations.
+
+use super::UInt;
+use crate::{Limb, Wrapping};
+use core::ops::Not;
+
+impl<const LIMBS: usize> UInt<LIMBS> {
+    /// Computes bitwise `!a`.
+    #[inline(always)]
+    pub const fn not(&self) -> Self {
+        let mut limbs = [Limb::ZERO; LIMBS];
+        let mut i = 0;
+
+        while i < LIMBS {
+            limbs[i] = self.limbs[i].not();
+            i += 1;
+        }
+
+        Self { limbs }
+    }
+}
+
+impl<const LIMBS: usize> Not for UInt<LIMBS> {
+    type Output = Self;
+
+    fn not(self) -> <Self as Not>::Output {
+        (&self).not()
+    }
+}
+
+impl<const LIMBS: usize> Not for Wrapping<UInt<LIMBS>> {
+    type Output = Self;
+
+    fn not(self) -> <Self as Not>::Output {
+        Wrapping(self.0.not())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::U128;
+
+    #[test]
+    fn bitnot_ok() {
+        assert_eq!(U128::ZERO.not(), U128::MAX);
+        assert_eq!(U128::MAX.not(), U128::ZERO);
+    }
+}